diff options
Diffstat (limited to 'third_party/git/object.c')
-rw-r--r-- | third_party/git/object.c | 581 |
1 files changed, 0 insertions, 581 deletions
diff --git a/third_party/git/object.c b/third_party/git/object.c deleted file mode 100644 index 325751865625..000000000000 --- a/third_party/git/object.c +++ /dev/null @@ -1,581 +0,0 @@ -#include "cache.h" -#include "object.h" -#include "replace-object.h" -#include "object-store.h" -#include "blob.h" -#include "tree.h" -#include "commit.h" -#include "tag.h" -#include "alloc.h" -#include "packfile.h" -#include "commit-graph.h" - -unsigned int get_max_object_index(void) -{ - return the_repository->parsed_objects->obj_hash_size; -} - -struct object *get_indexed_object(unsigned int idx) -{ - return the_repository->parsed_objects->obj_hash[idx]; -} - -static const char *object_type_strings[] = { - NULL, /* OBJ_NONE = 0 */ - "commit", /* OBJ_COMMIT = 1 */ - "tree", /* OBJ_TREE = 2 */ - "blob", /* OBJ_BLOB = 3 */ - "tag", /* OBJ_TAG = 4 */ -}; - -const char *type_name(unsigned int type) -{ - if (type >= ARRAY_SIZE(object_type_strings)) - return NULL; - return object_type_strings[type]; -} - -int type_from_string_gently(const char *str, ssize_t len, int gentle) -{ - int i; - - if (len < 0) - len = strlen(str); - - for (i = 1; i < ARRAY_SIZE(object_type_strings); i++) - if (!strncmp(str, object_type_strings[i], len) && - object_type_strings[i][len] == '\0') - return i; - - if (gentle) - return -1; - - die(_("invalid object type \"%s\""), str); -} - -/* - * Return a numerical hash value between 0 and n-1 for the object with - * the specified sha1. n must be a power of 2. Please note that the - * return value is *not* consistent across computer architectures. - */ -static unsigned int hash_obj(const struct object_id *oid, unsigned int n) -{ - return oidhash(oid) & (n - 1); -} - -/* - * Insert obj into the hash table hash, which has length size (which - * must be a power of 2). On collisions, simply overflow to the next - * empty bucket. - */ -static void insert_obj_hash(struct object *obj, struct object **hash, unsigned int size) -{ - unsigned int j = hash_obj(&obj->oid, size); - - while (hash[j]) { - j++; - if (j >= size) - j = 0; - } - hash[j] = obj; -} - -/* - * Look up the record for the given sha1 in the hash map stored in - * obj_hash. Return NULL if it was not found. - */ -struct object *lookup_object(struct repository *r, const struct object_id *oid) -{ - unsigned int i, first; - struct object *obj; - - if (!r->parsed_objects->obj_hash) - return NULL; - - first = i = hash_obj(oid, r->parsed_objects->obj_hash_size); - while ((obj = r->parsed_objects->obj_hash[i]) != NULL) { - if (oideq(oid, &obj->oid)) - break; - i++; - if (i == r->parsed_objects->obj_hash_size) - i = 0; - } - if (obj && i != first) { - /* - * Move object to where we started to look for it so - * that we do not need to walk the hash table the next - * time we look for it. - */ - SWAP(r->parsed_objects->obj_hash[i], - r->parsed_objects->obj_hash[first]); - } - return obj; -} - -/* - * Increase the size of the hash map stored in obj_hash to the next - * power of 2 (but at least 32). Copy the existing values to the new - * hash map. - */ -static void grow_object_hash(struct repository *r) -{ - int i; - /* - * Note that this size must always be power-of-2 to match hash_obj - * above. - */ - int new_hash_size = r->parsed_objects->obj_hash_size < 32 ? 32 : 2 * r->parsed_objects->obj_hash_size; - struct object **new_hash; - - new_hash = xcalloc(new_hash_size, sizeof(struct object *)); - for (i = 0; i < r->parsed_objects->obj_hash_size; i++) { - struct object *obj = r->parsed_objects->obj_hash[i]; - - if (!obj) - continue; - insert_obj_hash(obj, new_hash, new_hash_size); - } - free(r->parsed_objects->obj_hash); - r->parsed_objects->obj_hash = new_hash; - r->parsed_objects->obj_hash_size = new_hash_size; -} - -void *create_object(struct repository *r, const struct object_id *oid, void *o) -{ - struct object *obj = o; - - obj->parsed = 0; - obj->flags = 0; - oidcpy(&obj->oid, oid); - - if (r->parsed_objects->obj_hash_size - 1 <= r->parsed_objects->nr_objs * 2) - grow_object_hash(r); - - insert_obj_hash(obj, r->parsed_objects->obj_hash, - r->parsed_objects->obj_hash_size); - r->parsed_objects->nr_objs++; - return obj; -} - -void *object_as_type(struct object *obj, enum object_type type, int quiet) -{ - if (obj->type == type) - return obj; - else if (obj->type == OBJ_NONE) { - if (type == OBJ_COMMIT) - init_commit_node((struct commit *) obj); - else - obj->type = type; - return obj; - } - else { - if (!quiet) - error(_("object %s is a %s, not a %s"), - oid_to_hex(&obj->oid), - type_name(obj->type), type_name(type)); - return NULL; - } -} - -struct object *lookup_unknown_object(const struct object_id *oid) -{ - struct object *obj = lookup_object(the_repository, oid); - if (!obj) - obj = create_object(the_repository, oid, - alloc_object_node(the_repository)); - return obj; -} - -struct object *parse_object_buffer(struct repository *r, const struct object_id *oid, enum object_type type, unsigned long size, void *buffer, int *eaten_p) -{ - struct object *obj; - *eaten_p = 0; - - obj = NULL; - if (type == OBJ_BLOB) { - struct blob *blob = lookup_blob(r, oid); - if (blob) { - if (parse_blob_buffer(blob, buffer, size)) - return NULL; - obj = &blob->object; - } - } else if (type == OBJ_TREE) { - struct tree *tree = lookup_tree(r, oid); - if (tree) { - obj = &tree->object; - if (!tree->buffer) - tree->object.parsed = 0; - if (!tree->object.parsed) { - if (parse_tree_buffer(tree, buffer, size)) - return NULL; - *eaten_p = 1; - } - } - } else if (type == OBJ_COMMIT) { - struct commit *commit = lookup_commit(r, oid); - if (commit) { - if (parse_commit_buffer(r, commit, buffer, size, 1)) - return NULL; - if (!get_cached_commit_buffer(r, commit, NULL)) { - set_commit_buffer(r, commit, buffer, size); - *eaten_p = 1; - } - obj = &commit->object; - } - } else if (type == OBJ_TAG) { - struct tag *tag = lookup_tag(r, oid); - if (tag) { - if (parse_tag_buffer(r, tag, buffer, size)) - return NULL; - obj = &tag->object; - } - } else { - warning(_("object %s has unknown type id %d"), oid_to_hex(oid), type); - obj = NULL; - } - return obj; -} - -struct object *parse_object_or_die(const struct object_id *oid, - const char *name) -{ - struct object *o = parse_object(the_repository, oid); - if (o) - return o; - - die(_("unable to parse object: %s"), name ? name : oid_to_hex(oid)); -} - -struct object *parse_object(struct repository *r, const struct object_id *oid) -{ - unsigned long size; - enum object_type type; - int eaten; - const struct object_id *repl = lookup_replace_object(r, oid); - void *buffer; - struct object *obj; - - obj = lookup_object(r, oid); - if (obj && obj->parsed) - return obj; - - if ((obj && obj->type == OBJ_BLOB && repo_has_object_file(r, oid)) || - (!obj && repo_has_object_file(r, oid) && - oid_object_info(r, oid, NULL) == OBJ_BLOB)) { - if (check_object_signature(r, repl, NULL, 0, NULL) < 0) { - error(_("hash mismatch %s"), oid_to_hex(oid)); - return NULL; - } - parse_blob_buffer(lookup_blob(r, oid), NULL, 0); - return lookup_object(r, oid); - } - - buffer = repo_read_object_file(r, oid, &type, &size); - if (buffer) { - if (check_object_signature(r, repl, buffer, size, - type_name(type)) < 0) { - free(buffer); - error(_("hash mismatch %s"), oid_to_hex(repl)); - return NULL; - } - - obj = parse_object_buffer(r, oid, type, size, - buffer, &eaten); - if (!eaten) - free(buffer); - return obj; - } - return NULL; -} - -struct object_list *object_list_insert(struct object *item, - struct object_list **list_p) -{ - struct object_list *new_list = xmalloc(sizeof(struct object_list)); - new_list->item = item; - new_list->next = *list_p; - *list_p = new_list; - return new_list; -} - -int object_list_contains(struct object_list *list, struct object *obj) -{ - while (list) { - if (list->item == obj) - return 1; - list = list->next; - } - return 0; -} - -void object_list_free(struct object_list **list) -{ - while (*list) { - struct object_list *p = *list; - *list = p->next; - free(p); - } -} - -/* - * A zero-length string to which object_array_entry::name can be - * initialized without requiring a malloc/free. - */ -static char object_array_slopbuf[1]; - -void add_object_array_with_path(struct object *obj, const char *name, - struct object_array *array, - unsigned mode, const char *path) -{ - unsigned nr = array->nr; - unsigned alloc = array->alloc; - struct object_array_entry *objects = array->objects; - struct object_array_entry *entry; - - if (nr >= alloc) { - alloc = (alloc + 32) * 2; - REALLOC_ARRAY(objects, alloc); - array->alloc = alloc; - array->objects = objects; - } - entry = &objects[nr]; - entry->item = obj; - if (!name) - entry->name = NULL; - else if (!*name) - /* Use our own empty string instead of allocating one: */ - entry->name = object_array_slopbuf; - else - entry->name = xstrdup(name); - entry->mode = mode; - if (path) - entry->path = xstrdup(path); - else - entry->path = NULL; - array->nr = ++nr; -} - -void add_object_array(struct object *obj, const char *name, struct object_array *array) -{ - add_object_array_with_path(obj, name, array, S_IFINVALID, NULL); -} - -/* - * Free all memory associated with an entry; the result is - * in an unspecified state and should not be examined. - */ -static void object_array_release_entry(struct object_array_entry *ent) -{ - if (ent->name != object_array_slopbuf) - free(ent->name); - free(ent->path); -} - -struct object *object_array_pop(struct object_array *array) -{ - struct object *ret; - - if (!array->nr) - return NULL; - - ret = array->objects[array->nr - 1].item; - object_array_release_entry(&array->objects[array->nr - 1]); - array->nr--; - return ret; -} - -void object_array_filter(struct object_array *array, - object_array_each_func_t want, void *cb_data) -{ - unsigned nr = array->nr, src, dst; - struct object_array_entry *objects = array->objects; - - for (src = dst = 0; src < nr; src++) { - if (want(&objects[src], cb_data)) { - if (src != dst) - objects[dst] = objects[src]; - dst++; - } else { - object_array_release_entry(&objects[src]); - } - } - array->nr = dst; -} - -void object_array_clear(struct object_array *array) -{ - int i; - for (i = 0; i < array->nr; i++) - object_array_release_entry(&array->objects[i]); - FREE_AND_NULL(array->objects); - array->nr = array->alloc = 0; -} - -/* - * Return true iff array already contains an entry with name. - */ -static int contains_name(struct object_array *array, const char *name) -{ - unsigned nr = array->nr, i; - struct object_array_entry *object = array->objects; - - for (i = 0; i < nr; i++, object++) - if (!strcmp(object->name, name)) - return 1; - return 0; -} - -void object_array_remove_duplicates(struct object_array *array) -{ - unsigned nr = array->nr, src; - struct object_array_entry *objects = array->objects; - - array->nr = 0; - for (src = 0; src < nr; src++) { - if (!contains_name(array, objects[src].name)) { - if (src != array->nr) - objects[array->nr] = objects[src]; - array->nr++; - } else { - object_array_release_entry(&objects[src]); - } - } -} - -void clear_object_flags(unsigned flags) -{ - int i; - - for (i=0; i < the_repository->parsed_objects->obj_hash_size; i++) { - struct object *obj = the_repository->parsed_objects->obj_hash[i]; - if (obj) - obj->flags &= ~flags; - } -} - -void clear_commit_marks_all(unsigned int flags) -{ - int i; - - for (i = 0; i < the_repository->parsed_objects->obj_hash_size; i++) { - struct object *obj = the_repository->parsed_objects->obj_hash[i]; - if (obj && obj->type == OBJ_COMMIT) - obj->flags &= ~flags; - } -} - -struct parsed_object_pool *parsed_object_pool_new(void) -{ - struct parsed_object_pool *o = xmalloc(sizeof(*o)); - memset(o, 0, sizeof(*o)); - - o->blob_state = allocate_alloc_state(); - o->tree_state = allocate_alloc_state(); - o->commit_state = allocate_alloc_state(); - o->tag_state = allocate_alloc_state(); - o->object_state = allocate_alloc_state(); - - o->is_shallow = -1; - o->shallow_stat = xcalloc(1, sizeof(*o->shallow_stat)); - - o->buffer_slab = allocate_commit_buffer_slab(); - - return o; -} - -struct raw_object_store *raw_object_store_new(void) -{ - struct raw_object_store *o = xmalloc(sizeof(*o)); - - memset(o, 0, sizeof(*o)); - INIT_LIST_HEAD(&o->packed_git_mru); - hashmap_init(&o->pack_map, pack_map_entry_cmp, NULL, 0); - pthread_mutex_init(&o->replace_mutex, NULL); - return o; -} - -static void free_object_directory(struct object_directory *odb) -{ - free(odb->path); - odb_clear_loose_cache(odb); - free(odb); -} - -static void free_object_directories(struct raw_object_store *o) -{ - while (o->odb) { - struct object_directory *next; - - next = o->odb->next; - free_object_directory(o->odb); - o->odb = next; - } -} - -void raw_object_store_clear(struct raw_object_store *o) -{ - FREE_AND_NULL(o->alternate_db); - - oidmap_free(o->replace_map, 1); - FREE_AND_NULL(o->replace_map); - pthread_mutex_destroy(&o->replace_mutex); - - free_commit_graph(o->commit_graph); - o->commit_graph = NULL; - o->commit_graph_attempted = 0; - - free_object_directories(o); - o->odb_tail = NULL; - o->loaded_alternates = 0; - - INIT_LIST_HEAD(&o->packed_git_mru); - close_object_store(o); - o->packed_git = NULL; - - hashmap_free(&o->pack_map); -} - -void parsed_object_pool_clear(struct parsed_object_pool *o) -{ - /* - * As objects are allocated in slabs (see alloc.c), we do - * not need to free each object, but each slab instead. - * - * Before doing so, we need to free any additional memory - * the objects may hold. - */ - unsigned i; - - for (i = 0; i < o->obj_hash_size; i++) { - struct object *obj = o->obj_hash[i]; - - if (!obj) - continue; - - if (obj->type == OBJ_TREE) - free_tree_buffer((struct tree*)obj); - else if (obj->type == OBJ_COMMIT) - release_commit_memory(o, (struct commit*)obj); - else if (obj->type == OBJ_TAG) - release_tag_memory((struct tag*)obj); - } - - FREE_AND_NULL(o->obj_hash); - o->obj_hash_size = 0; - - free_commit_buffer_slab(o->buffer_slab); - o->buffer_slab = NULL; - - clear_alloc_state(o->blob_state); - clear_alloc_state(o->tree_state); - clear_alloc_state(o->commit_state); - clear_alloc_state(o->tag_state); - clear_alloc_state(o->object_state); - stat_validity_clear(o->shallow_stat); - FREE_AND_NULL(o->blob_state); - FREE_AND_NULL(o->tree_state); - FREE_AND_NULL(o->commit_state); - FREE_AND_NULL(o->tag_state); - FREE_AND_NULL(o->object_state); - FREE_AND_NULL(o->shallow_stat); -} |